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Check in getOrCreateSubprogramDIE if a declaration exists and if so output

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it first.

This is a more general fix to pr11300.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144324 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-11-10 22:34:29 +00:00
parent 950dba04e0
commit 01b55b4a80
3 changed files with 55 additions and 13 deletions
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13
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -934,6 +934,12 @@ DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
if (SPDie)
return SPDie;
DISubprogram SPDecl = SP.getFunctionDeclaration();
DIE *DeclDie = NULL;
if (SPDecl.isSubprogram()) {
DeclDie = getOrCreateSubprogramDIE(SPDecl);
}
SPDie = new DIE(dwarf::DW_TAG_subprogram);
// DW_TAG_inlined_subroutine may refer to this DIE.
@ -952,8 +958,13 @@ DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
// If this DIE is going to refer declaration info using AT_specification
// then there is no need to add other attributes.
if (SP.getFunctionDeclaration().isSubprogram())
if (DeclDie) {
// Refer function declaration directly.
addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
DeclDie);
return SPDie;
}
// Constructors and operators for anonymous aggregates do not have names.
if (!SP.getName().empty())

12
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -598,20 +598,8 @@ void DwarfDebug::constructSubprogramDIE(CompileUnit *TheCU,
// class type.
return;
DISubprogram SPDecl = SP.getFunctionDeclaration();
DIE *DeclDie = NULL;
if (SPDecl.isSubprogram()) {
DeclDie = TheCU->getOrCreateSubprogramDIE(SPDecl);
}
DIE *SubprogramDie = TheCU->getOrCreateSubprogramDIE(SP);
if (DeclDie) {
// Refer function declaration directly.
TheCU->addDIEEntry(SubprogramDie, dwarf::DW_AT_specification,
dwarf::DW_FORM_ref4, DeclDie);
}
// Add to map.
TheCU->insertDIE(N, SubprogramDie);

43
test/DebugInfo/DW_AT_specification.ll Normal file
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@ -0,0 +1,43 @@
; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t -filetype=obj
; RUN: llvm-dwarfdump %t | FileCheck %s
; test that the DW_AT_specification is a back edge in the file.
; CHECK: 0x0000003c: DW_TAG_subprogram [5] *
; CHECK: 0x00000064: DW_AT_specification [DW_FORM_ref4] (cu + 0x003c => {0x0000003c})
@_ZZN3foo3barEvE1x = constant i32 0, align 4
define void @_ZN3foo3barEv() {
entry:
ret void, !dbg !25
}
!llvm.dbg.cu = !{!0}
!0 = metadata !{i32 720913, i32 0, i32 4, metadata !"<unknown>", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/toolkit/library", metadata !"clang version 3.0 ()", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !18} ; [ DW_TAG_compile_unit ]
!1 = metadata !{metadata !2}
!2 = metadata !{i32 0}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !5}
!5 = metadata !{i32 720942, i32 0, null, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", metadata !6, i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, void ()* @_ZN3foo3barEv, null, metadata !11, metadata !16} ; [ DW_TAG_subprogram ]
!6 = metadata !{i32 720937, metadata !"nsNativeAppSupportBase.ii", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/toolkit/library", null} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
!8 = metadata !{null, metadata !9}
!9 = metadata !{i32 720911, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
!10 = metadata !{i32 720915, null, metadata !"foo", metadata !6, i32 1, i64 0, i64 0, i32 0, i32 4, i32 0, null, i32 0, i32 0} ; [ DW_TAG_structure_type ]
!11 = metadata !{i32 720942, i32 0, metadata !12, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", metadata !6, i32 2, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !14} ; [ DW_TAG_subprogram ]
!12 = metadata !{i32 720898, null, metadata !"foo", metadata !6, i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !13, i32 0, null, null} ; [ DW_TAG_class_type ]
!13 = metadata !{metadata !11}
!14 = metadata !{metadata !15}
!15 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
!16 = metadata !{metadata !17}
!17 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
!18 = metadata !{metadata !19}
!19 = metadata !{metadata !20}
!20 = metadata !{i32 720948, i32 0, metadata !5, metadata !"x", metadata !"x", metadata !"", metadata !6, i32 5, metadata !21, i32 1, i32 1, i32* @_ZZN3foo3barEvE1x} ; [ DW_TAG_variable ]
!21 = metadata !{i32 720934, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !22} ; [ DW_TAG_const_type ]
!22 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!25 = metadata !{i32 6, i32 1, metadata !26, null}
!26 = metadata !{i32 720907, metadata !5, i32 4, i32 17, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]